Fixes countdowns being out of movement sync with their atom (#20219)

* countdowns move when their attached atom moves

* fallback

code/modules/countdown/countdown.dm

@@ -17,6 +17,7 @@
 /obj/effect/countdown/Initialize(mapload)
 	. = ..()
 	attach(loc)
+	RegisterSignal(attached_to, COMSIG_MOVABLE_MOVED, PROC_REF(countdown_on_move))
 
 /obj/effect/countdown/examine(mob/user)
 	. = ..()
@@ -37,14 +38,19 @@
 		STOP_PROCESSING(SSfastprocess, src)
 		started = FALSE
 
+/// Get the value from our atom
 /obj/effect/countdown/proc/get_value()
-	// Get the value from our atom
 	return
 
+/obj/effect/countdown/proc/countdown_on_move()
+	SIGNAL_HANDLER
+	forceMove(get_turf(attached_to))
+
 /obj/effect/countdown/process()
 	if(!attached_to || QDELETED(attached_to))
 		qdel(src)
-	forceMove(get_turf(attached_to))
+	if(!isturf(attached_to.loc)) // When in crates, lockers, etc. countdown_on_move wont be called. This is our backup
+		forceMove(get_turf(attached_to))
 	var/new_val = get_value()
 	if(new_val == displayed_text)
 		return